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Select Main Deck Cards

{1}{U}
Anticipate
Instant
Look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.
{3}{U}
Aquatic Incursion
Enchantment
When Aquatic Incursion enters the battlefield, create two 1/1 blue Merfolk creature tokens with hexproof. (They can't be the targets of spells or abilities your opponents control.)

{3}{U}: Target Merfolk can't be blocked this turn.
{1}{U}
Arcane Denial
Instant
Counter target spell. Its controller may draw up to two cards at the beginning of the next turn's upkeep.

You draw a card at the beginning of the next turn's upkeep.
{1}{U}
Augur of Bolas
Creature - Merfolk Wizard
When Augur of Bolas enters the battlefield, look at the top three cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in any order.
1 / 3
{U}
Benthic Biomancer
Creature - Merfolk Wizard Mutant
{1}{U}: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)

Whenever one or more +1/+1 counters are put on Benthic Biomancer, draw a card, then discard a card.
1 / 1
{1}{U}
Beyeen Veil
Instant
Creatures your opponents control get -2/-0 until end of turn.
--
Beyeen Coast
Land

Beyeen Coast enters the battlefield tapped.

{T}: Add {U}.
{2}{U}{U}
Bident of Thassa
Legendary Enchantment Artifact
Whenever a creature you control deals combat damage to a player, you may draw a card.

{1}{U}, {T}: Creatures your opponents control attack this turn if able.
--
Botanical Sanctum
Land
Botanical Sanctum enters the battlefield tapped unless you control two or fewer other lands.

{T}: Add {G} or {U}.
{U}
Brainstorm
Instant
Draw three cards, then put two cards from your hand on top of your library in any order.
--
Breeding Pool
Land - Forest Island
({T}: Add {G} or {U}.)

As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{1}{U}
Buoyancy
Enchantment - Aura
Flash

Enchant creature

Enchanted creature has flying.
--
Cave of Temptation
Land
{T}: Add {C}.

{1}, {T}: Add one mana of any color.

{4}, {T}, Sacrifice Cave of Temptation: Put two +1/+1 counters on target creature. Activate only as a sorcery.
--
Cephalid Coliseum
Land
{T}: Add {U}. Cephalid Coliseum deals 1 damage to you.

Threshold -- {U}, {T}, Sacrifice Cephalid Coliseum: Target player draws three cards, then discards three cards. Activate only if seven or more cards are in your graveyard.
{1}{G/U}{G/U}
Cold-Eyed Selkie
Creature - Merfolk Rogue
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Whenever Cold-Eyed Selkie deals combat damage to a player, you may draw that many cards.
1 / 1
{G}{U}
Combine Guildmage
Creature - Merfolk Wizard
{1}{G}, {T}: This turn, each creature you control enters the battlefield with an additional +1/+1 counter on it.

{1}{U}, {T}: Move a +1/+1 counter from target creature you control onto another target creature you control.
2 / 2
--
Command Tower
Land
{T}: Add one mana of any color in your commander's color identity.
--
Coral Atoll
Land
Coral Atoll enters the battlefield tapped.

When Coral Atoll enters the battlefield, sacrifice it unless you return an untapped Island you control to its owner's hand.

{T}: Add {C}{U}.
{U}{U}
Coralhelm Commander
Creature - Merfolk Soldier
Level up {1} ({1}: Put a level counter on this. Level up only as a sorcery.)

LEVEL 2-3

3/3

Flying

LEVEL 4+

4/4

Flying

Other Merfolk creatures you control get +1/+1.
2 / 2
{U}
Cosi's Trickster
Creature - Merfolk Wizard
Whenever an opponent shuffles their library, you may put a +1/+1 counter on Cosi's Trickster.
1 / 1
{U}{U}
Counterspell
Instant
Counter target spell.
{2}{U}
Crashing Tide
Sorcery
This spell has flash as long as you control a Merfolk.

Return target creature to its owner's hand.

Draw a card.
{U}
Dakra Mystic
Creature - Merfolk Wizard
{U}, {T}: Each player reveals the top card of their library. You may put the revealed cards into their owners' graveyards. If you don't, each player draws a card.
1 / 1
{5}{U}
Deepchannel Mentor
Creature - Merfolk Rogue
Blue creatures you control can't be blocked.
2 / 2
{1}{G}
Deeproot Champion
Creature - Merfolk Shaman
Whenever you cast a noncreature spell, put a +1/+1 counter on Deeproot Champion.
1 / 1
{1}{G}
Deeproot Elite
Creature - Merfolk Warrior
Whenever another Merfolk enters the battlefield under your control, put a +1/+1 counter on target Merfolk you control.
1 / 1
{2}{U}
Deeproot Waters
Enchantment
Whenever you cast a Merfolk spell, create a 1/1 blue Merfolk creature token with hexproof. (A creature with hexproof can't be the target of spells or abilities your opponents control.)
{1}{U}
Diplomatic Immunity
Enchantment - Aura
Enchant creature

Shroud (A permanent with shroud can't be the target of spells or abilities.)

Enchanted creature has shroud.
{2}{U}{U}
Domestication
Enchantment - Aura
Enchant creature

You control enchanted creature.

At the beginning of your end step, if enchanted creature's power is 4 or greater, sacrifice Domestication.
--
Dreamroot Cascade
Land
Dreamroot Cascade enters the battlefield tapped unless you control two or more other lands.

{T}: Add {G} or {U}.
{3}{U}{U}
Empress Galina
Legendary Creature - Merfolk Noble
{U}{U}, {T}: Gain control of target legendary permanent. (This effect lasts indefinitely.)
1 / 3
{U}
Enclave Cryptologist
Creature - Merfolk Wizard
Level up {1}{U} ({1}{U}: Put a level counter on this. Level up only as a sorcery.)

LEVEL 1-2

0/1

{T}: Draw a card, then discard a card.

LEVEL 3+

0/1

{T}: Draw a card.
0 / 1
{2}{U}
Enclave Elite
Creature - Merfolk Soldier
Multikicker {1}{U} (You may pay an additional {1}{U} any number of times as you cast this spell.)

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Enclave Elite enters the battlefield with a +1/+1 counter on it for each time it was kicked.
2 / 2
{3}{U}
Fallowsage
Creature - Merfolk Wizard
Whenever Fallowsage becomes tapped, you may draw a card.
2 / 2
{3}{U}{U}
Fathom Trawl
Sorcery
Reveal cards from the top of your library until you reveal three nonland cards. Put the nonland cards revealed this way into your hand, then put the rest of the revealed cards on the bottom of your library in any order.
{2}{U}
Field Research
Sorcery
Kicker {2}{U} (You may pay an additional {2}{U} as you cast this spell.)

Draw two cards. If this spell was kicked, draw three cards instead.
--
Flooded Grove
Land
{T}: Add {C}.

{G/U}, {T}: Add {G}{G}, {G}{U}, or {U}{U}.
{5}{U}
Flow of Ideas
Sorcery
Draw a card for each Island you control.
{2}{U}{U}
Foil
Instant
You may discard an Island card and another card rather than pay this spell's mana cost.

Counter target spell.
{3}{G}
Forerunner of the Heralds
Creature - Merfolk Scout
When Forerunner of the Heralds enters the battlefield, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.

Whenever another Merfolk enters the battlefield under your control, put a +1/+1 counter on Forerunner of the Heralds.
3 / 2
{1}{G}
Giltgrove Stalker
Creature - Merfolk Warrior
Giltgrove Stalker can't be blocked by creatures with power 2 or less.
2 / 1
{U}{U}
Grimoire Thief
Creature - Merfolk Rogue
Whenever Grimoire Thief becomes tapped, exile the top three cards of target opponent's library face down.

You may look at cards exiled with Grimoire Thief.

{U}, Sacrifice Grimoire Thief: Turn all cards exiled with Grimoire Thief face up. Counter all spells with those names.
2 / 2
{1}{G}{U}
Hadana's Climb
Legendary Enchantment
At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. Then if that creature has three or more +1/+1 counters on it, transform Hadana's Climb.
--
Winged Temple of Orazca
Legendary Land

(Transforms from Hadana's Climb.)

{T}: Add one mana of any color.

{1}{G}{U}, {T}: Target creature you control gains flying and gets +X/+X until end of turn, where X is its power.
--
Halimar Depths
Land
Halimar Depths enters the battlefield tapped.

When Halimar Depths enters the battlefield, look at the top three cards of your library, then put them back in any order.

{T}: Add {U}.
{1}{U}
Halimar Wavewatch
Creature - Merfolk Soldier
Level up {2} ({2}: Put a level counter on this. Level up only as a sorcery.)

LEVEL 1-4

0/6

LEVEL 5+

6/6

Islandwalk (This creature can't be blocked as long as defending player controls an Island.)
0 / 3
--
Hall of Oracles
Land
{T}: Add {C}.

{1}, {T}: Add one mana of any color.

{T}: Put a +1/+1 counter on target creature. Activate only as a sorcery and only if you've cast an instant or sorcery spell this turn.
{U}{U}
Harbinger of the Tides
Creature - Merfolk Wizard
You may cast Harbinger of the Tides as though it had flash if you pay {2} more to cast it. (You may cast it any time you could cast an instant.)

When Harbinger of the Tides enters the battlefield, you may return target tapped creature an opponent controls to its owner's hand.
2 / 2
{3}{U}
Herald of Secret Streams
Creature - Merfolk Warrior
Creatures you control with +1/+1 counters on them can't be blocked.
2 / 3
{3}{U}{U}
Inkfathom Divers
Creature - Merfolk Soldier
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

When Inkfathom Divers enters the battlefield, look at the top four cards of your library, then put them back in any order.
3 / 3
{G}
Jade Bearer
Creature - Merfolk Shaman
When Jade Bearer enters the battlefield, put a +1/+1 counter on another target Merfolk you control.
1 / 1
{3}{G}
Jade Guardian
Creature - Merfolk Shaman
Hexproof (This creature can't be the target of spells or abilities your opponents control.)

When Jade Guardian enters the battlefield, put a +1/+1 counter on target Merfolk you control.
2 / 2
{1}{G}{G}
Jadelight Ranger
Creature - Merfolk Scout Ranger
When Jadelight Ranger enters the battlefield, it explores, then it explores again. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard. Then repeat this process.)
2 / 1
{G}
Jungle Delver
Creature - Merfolk Warrior
{3}{G}: Put a +1/+1 counter on Jungle Delver.
1 / 1
{2}{G}
Jungleborn Pioneer
Creature - Merfolk Scout
When Jungleborn Pioneer enters the battlefield, create a 1/1 blue Merfolk creature token with hexproof. (It can't be the target of spells or abilities your opponents control.)
2 / 2
{1}{U}
Jwari Disruption
Instant
Counter target spell unless its controller pays {1}.
--
Jwari Ruins
Land

Jwari Ruins enters the battlefield tapped.

{T}: Add {U}.
{3}{U}{U}
Kindred Discovery
Enchantment
As Kindred Discovery enters the battlefield, choose a creature type.

Whenever a creature you control of the chosen type enters the battlefield or attacks, draw a card.
{5}{U}{U}
Kiora Bests the Sea God
Enchantment - Saga
(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Create an 8/8 blue Kraken creature token with hexproof.

II -- Tap all nonland permanents target opponent controls. They don't untap during their controller's next untap step.

III -- Gain control of target permanent an opponent controls. Untap it.
{U}
Kiora's Dismissal
Instant
Strive -- This spell costs {U} more to cast for each target beyond the first.

Return any number of target enchantments to their owners' hands.
{G}{U}
Kiora's Follower
Creature - Merfolk
{T}: Untap another target permanent.
2 / 2
{2}{G/U}
Kiora, Behemoth Beckoner
Legendary Planeswalker - Kiora
Whenever a creature with power 4 or greater enters the battlefield under your control, draw a card.

-1: Untap target permanent.
L: 7
{2}{G}{U}
Kiora, Master of the Depths
Legendary Planeswalker - Kiora
+1: Untap up to one target creature and up to one target land.

-2: Reveal the top four cards of your library. You may put a creature card and/or a land card from among them into your hand. Put the rest into your graveyard.

-8: You get an emblem with "Whenever a creature enters the battlefield under your control, you may have it fight target creature." Then create three 8/8 blue Octopus creature tokens.
L: 4
{2}{G}{U}
Kiora, the Crashing Wave
Legendary Planeswalker - Kiora
+1: Until your next turn, prevent all damage that would be dealt to and dealt by target permanent an opponent controls.

-1: Draw a card. You may play an additional land this turn.

-5: You get an emblem with "At the beginning of your end step, create a 9/9 blue Kraken creature token."
L: 2
{1}{U}{U}
Kopala, Warden of Waves
Legendary Creature - Merfolk Wizard
Spells your opponents cast that target a Merfolk you control cost {2} more to cast.

Abilities your opponents activate that target a Merfolk you control cost {2} more to activate.
2 / 2
{2}{U}{U}
Kumena's Awakening
Enchantment
Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)

At the beginning of your upkeep, each player draws a card. If you have the city's blessing, instead only you draw a card.
{G}
Kumena's Speaker
Creature - Merfolk Shaman
Kumena's Speaker gets +1/+1 as long as you control another Merfolk or an Island.
1 / 1
{1}{G}{U}
Kumena, Tyrant of Orazca
Legendary Creature - Merfolk Shaman
Tap another untapped Merfolk you control: Kumena, Tyrant of Orazca can't be blocked this turn.

Tap three untapped Merfolk you control: Draw a card.

Tap five untapped Merfolk you control: Put a +1/+1 counter on each Merfolk you control.
2 / 4
{2}{U}
Library Larcenist
Creature - Merfolk Rogue
Whenever Library Larcenist attacks, draw a card.
1 / 2
--
Littjara Mirrorlake
Land
Littjara Mirrorlake enters the battlefield tapped.

{T}: Add {U}.

{2}{G}{G}{U}, {T}, Sacrifice Littjara Mirrorlake: Create a token that's a copy of target creature you control, except it enters the battlefield with an additional +1/+1 counter on it. Activate only as a sorcery.
--
Lonely Sandbar
Land
Lonely Sandbar enters the battlefield tapped.

{T}: Add {U}.

Cycling {U} ({U}, Discard this card: Draw a card.)
{U}{U}
Lord of Atlantis
Creature - Merfolk
Other Merfolk get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)
2 / 2
{1}{U}{U}
Lullmage Mentor
Creature - Merfolk Wizard
Whenever a spell or ability you control counters a spell, you may create a 1/1 blue Merfolk creature token.

Tap seven untapped Merfolk you control: Counter target spell.
2 / 2
{X}{U}{U}{U}
Lullmage's Domination
Sorcery
This spell costs {3} less to cast if it targets a creature whose controller has eight or more cards in their graveyard.

Gain control of target creature with mana value X.
{3}{U}
Master of Waves
Creature - Merfolk Wizard
Protection from red

Elemental creatures you control get +1/+1.

When Master of Waves enters the battlefield, create a number of 1/0 blue Elemental creature tokens equal to your devotion to blue. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
2 / 1
{U}{U}
Master of the Pearl Trident
Creature - Merfolk
Other Merfolk creatures you control get +1/+1 and have islandwalk. (They can't be blocked as long as defending player controls an Island.)
2 / 2
{1}{G}
Merfolk Branchwalker
Creature - Merfolk Scout
When Merfolk Branchwalker enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)
2 / 1
{1}{U}
Merfolk Looter
Creature - Merfolk Rogue
{T}: Draw a card, then discard a card.
1 / 1
{G}{U}
Merfolk Mistbinder
Creature - Merfolk Shaman
Other Merfolk you control get +1/+1.
2 / 2
{U}{ // }{U}
Merfolk Secretkeeper // Venture Deeper
Creature - Merfolk Wizard // Sorcery - Adventure




Target player mills four cards. (Then exile this card. You may cast the creature later from exile.)
0 / 4
{G}{U}
Merfolk Skydiver
Creature - Merfolk Mutant
Flying

When Merfolk Skydiver enters the battlefield, put a +1/+1 counter on target creature you control.

{3}{G}{U}: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
1 / 1
{1}{U}{U}
Merfolk Sovereign
Creature - Merfolk Noble
Other Merfolk creatures you control get +1/+1.

{T}: Target Merfolk creature can't be blocked this turn.
2 / 2
{U}{U}
Merfolk Trickster
Creature - Merfolk Wizard
Flash

When Merfolk Trickster enters the battlefield, tap target creature an opponent controls. It loses all abilities until end of turn.
2 / 2
{2}{U}
Merfolk Wayfinder
Creature - Merfolk Scout
Flying

When Merfolk Wayfinder enters the battlefield, reveal the top three cards of your library. Put all Island cards revealed this way into your hand and the rest on the bottom of your library in any order.
1 / 2
{1}{U}
Merrow Commerce
Tribal Enchantment - Merfolk
At the beginning of your end step, untap all Merfolk you control.
{3}{U}
Merrow Harbinger
Creature - Merfolk Wizard
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

When Merrow Harbinger enters the battlefield, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.
2 / 3
{2}{U}
Merrow Reejerey
Creature - Merfolk Soldier
Other Merfolk creatures you control get +1/+1.

Whenever you cast a Merfolk spell, you may tap or untap target permanent.
2 / 2
--
Mikokoro, Center of the Sea
Legendary Land
{T}: Add {C}.

{2}, {T}: Each player draws a card.
{X}{U}{U}
Mind Spring
Sorcery
Draw X cards.
{U}
Mist-Cloaked Herald
Creature - Merfolk Warrior
Mist-Cloaked Herald can't be blocked.
1 / 1
{U}
Mistcaller
Creature - Merfolk Wizard
Sacrifice Mistcaller: Until end of turn, if a nontoken creature would enter the battlefield and it wasn't cast, exile it instead.
1 / 1
--
Moonring Island
Land - Island
({T}: Add {U}.)

Moonring Island enters the battlefield tapped.

{U}, {T}: Look at the top card of target player's library. Activate only if you control two or more blue permanents.
{4}{U}
Mysteries of the Deep
Instant
Draw two cards.

Landfall -- If you had a land enter the battlefield under your control this turn, draw three cards instead.
--
Mystic Sanctuary
Land - Island
({T}: Add {U}.)

Mystic Sanctuary enters the battlefield tapped unless you control three or more other Islands.

When Mystic Sanctuary enters the battlefield untapped, you may put target instant or sorcery card from your graveyard on top of your library.
{2}{U}
Mystical Dispute
Instant
This spell costs {2} less to cast if it targets a blue spell.

Counter target spell unless its controller pays {3}.
{1}{U}
Negate
Instant
Counter target noncreature spell.
--
Novijen, Heart of Progress
Land
{T}: Add {C}.

{G}{U}, {T}: Put a +1/+1 counter on each creature that entered the battlefield this turn.
{1}{U}
One With the Wind
Enchantment - Aura
Enchant creature

Enchanted creature gets +2/+2 and has flying.
{4}{U}{U}{U}
Overflowing Insight
Sorcery
Target player draws seven cards.
{2}{U}
Paperfin Rascal
Creature - Merfolk Rogue
When Paperfin Rascal enters the battlefield, clash with an opponent. If you win, put a +1/+1 counter on Paperfin Rascal. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)
2 / 2
--
Path of Ancestry
Land
Path of Ancestry enters the battlefield tapped.

{T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
{U}
Ponder
Sorcery
Look at the top three cards of your library, then put them back in any order. You may shuffle.

Draw a card.
{2}{G}{G}{U}{U}
Prime Speaker Zegana
Legendary Creature - Merfolk Wizard
Prime Speaker Zegana enters the battlefield with X +1/+1 counters on it, where X is the greatest power among other creatures you control.

When Prime Speaker Zegana enters the battlefield, draw cards equal to its power.
1 / 1
{3}{U}
Protective Bubble
Enchantment - Aura
Enchant creature

Enchanted creature can't be blocked and has shroud. (It can't be the target of spells or abilities.)
--
Quandrix Campus
Land
Quandrix Campus enters the battlefield tapped.

{T}: Add {G} or {U}.

{4}, {T}: Scry 1.
{1}{G/U}{G/U}
Quandrix Pledgemage
Creature - Merfolk Druid
Magecraft -- Whenever you cast or copy an instant or sorcery spell, put a +1/+1 counter on Quandrix Pledgemage.
2 / 2
{1}{U}
Raving Visionary
Creature - Merfolk Wizard
{U}, {T}: Draw a card, then discard a card.

Delirium -- {2}{U}, {T}: Draw a card. Activate only if there are four or more card types among cards in your graveyard.
1 / 1
--
Rejuvenating Springs
Land
Rejuvenating Springs enters the battlefield tapped unless you have two or more opponents.

{T}: Add {G} or {U}.
{2}{U}
Release to the Wind
Instant
Exile target nonland permanent. For as long as that card remains exiled, its owner may cast it without paying its mana cost.
{1}{U}
Research the Deep
Sorcery
Draw a card. Clash with an opponent. If you win, return Research the Deep to its owner's hand. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)
{2}{U}
Retreat to Coralhelm
Enchantment
Landfall -- Whenever a land enters the battlefield under your control, choose one --

• You may tap or untap target creature.

• Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)
--
Rimewood Falls
Snow Land - Forest Island
({T}: Add {G} or {U}.)

Rimewood Falls enters the battlefield tapped.
{2}{U}{U}
Rite of Replication
Sorcery
Kicker {5} (You may pay an additional {5} as you cast this spell.)

Create a token that's a copy of target creature. If this spell was kicked, create five of those tokens instead.
{1}{G}
River Heralds' Boon
Instant
Put a +1/+1 counter on target creature and a +1/+1 counter on up to one target Merfolk.
{1}{U}
River Sneak
Creature - Merfolk Warrior
River Sneak can't be blocked.

Whenever another Merfolk enters the battlefield under your control, River Sneak gets +1/+1 until end of turn.
1 / 1
{4}{U}{U}
River's Rebuke
Sorcery
Return all nonland permanents target player controls to their owner's hand.
{3}{U}
Riverwise Augur
Creature - Merfolk Wizard
When Riverwise Augur enters the battlefield, draw three cards, then put two cards from your hand on top of your library in any order.
2 / 2
{5}{U}{U}
Roiling Waters
Sorcery
Return up to two target creatures your opponents control to their owners' hands. Target player draws two cards.
{3}{U}
Run Aground
Instant
Put target artifact or creature on top of its owner's library.
{2}{U}
Sage of Fables
Creature - Merfolk Wizard
Each other Wizard creature you control enters the battlefield with an additional +1/+1 counter on it.

{2}, Remove a +1/+1 counter from a creature you control: Draw a card.
2 / 2
{4}{U}
Sage of the Falls
Creature - Merfolk Wizard
Whenever Sage of the Falls or another non-Human creature enters the battlefield under your control, you may draw a card. If you do, discard a card.
2 / 5
{3}{U}{U}
Salvager of Secrets
Creature - Merfolk Wizard
When Salvager of Secrets enters the battlefield, return target instant or sorcery card from your graveyard to your hand.
2 / 2
{1}{U}
Saprazzan Heir
Creature - Merfolk
Whenever Saprazzan Heir becomes blocked, you may draw three cards.
1 / 1
{1}{U}{U}
Scatter to the Winds
Instant
Counter target spell.

Awaken 3--{4}{U}{U} (If you cast this spell for {4}{U}{U}, also put three +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.)
{2}{U}{U}
Scattering Stroke
Instant
Counter target spell. Clash with an opponent. If you win, at the beginning of your next main phase, you may add an amount of {C} equal to that spell's mana value. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)
{2}{U}
Scroll Thief
Creature - Merfolk Rogue
Whenever Scroll Thief deals combat damage to a player, draw a card.
1 / 3
{2}{U}{U}
Seafloor Oracle
Creature - Merfolk Wizard
Whenever a Merfolk you control deals combat damage to a player, draw a card.
2 / 3
{1}{U}
Shaper Apprentice
Creature - Merfolk Wizard
Shaper Apprentice has flying as long as you control another Merfolk.
2 / 1
{1}{G}{U}
Shapers of Nature
Creature - Merfolk Shaman
{3}{G}: Put a +1/+1 counter on target creature.

{2}{U}, Remove a +1/+1 counter from a creature you control: Draw a card.
3 / 3
{G}
Shapers' Sanctuary
Enchantment
Whenever a creature you control becomes the target of a spell or ability an opponent controls, you may draw a card.
{3}{U}{U}
Shipwreck Dowser
Creature - Merfolk Wizard
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Shipwreck Dowser enters the battlefield, return target instant or sorcery card from your graveyard to your hand.
3 / 3
{1}{U}{U}
Sigil Tracer
Creature - Merfolk Wizard
{1}{U}, Tap two untapped Wizards you control: Copy target instant or sorcery spell. You may choose new targets for the copy.
2 / 2
{2}{U}
Silundi Vision
Instant
Look at the top six cards of your library. You may reveal an instant or sorcery card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
--
Silundi Isle
Land

Silundi Isle enters the battlefield tapped.

{T}: Add {U}.
{1}{U}
Silvergill Adept
Creature - Merfolk Wizard
As an additional cost to cast this spell, reveal a Merfolk card from your hand or pay {3}.

When Silvergill Adept enters the battlefield, draw a card.
2 / 1
{2}{U}
Simic Fluxmage
Creature - Merfolk Wizard
Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

{1}{U}, {T}: Move a +1/+1 counter from Simic Fluxmage onto target creature.
1 / 2
--
Simic Growth Chamber
Land
Simic Growth Chamber enters the battlefield tapped.

When Simic Growth Chamber enters the battlefield, return a land you control to its owner's hand.

{T}: Add {G}{U}.
--
Simic Guildgate
Land - Gate
Simic Guildgate enters the battlefield tapped.

{T}: Add {G} or {U}.
{4}{U}
Skyclave Plunder
Sorcery
Look at the top X cards of your library, where X is three plus the number of creatures in your party. Put three of those cards into your hand and the rest on the bottom of your library in a random order. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)
{2}{G}{G}
Slice in Twain
Instant
Destroy target artifact or enchantment.

Draw a card.
{6}{U}{U}
Slinn Voda, the Rising Deep
Legendary Creature - Leviathan
Kicker {1}{U} (You may pay an additional {1}{U} as you cast this spell.)

When Slinn Voda, the Rising Deep enters the battlefield, if it was kicked, return all creatures to their owners' hands except for Merfolk, Krakens, Leviathans, Octopuses, and Serpents.
8 / 8
{1}{U}
Soothsayer Adept
Creature - Merfolk Wizard
{1}{U}, {T}: Draw a card, then discard a card.
1 / 3
{U}
Spell Pierce
Instant
Counter target noncreature spell unless its controller pays {2}.
{1}{U}
Spreading Seas
Enchantment - Aura
Enchant land

When Spreading Seas enters the battlefield, draw a card.

Enchanted land is an Island.
{1}{U}
Stonybrook Banneret
Creature - Merfolk Wizard
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Merfolk spells and Wizard spells you cast cost {1} less to cast.
1 / 1
{3}{U}
Storm Sculptor
Creature - Merfolk Wizard
Storm Sculptor can't be blocked.

When Storm Sculptor enters the battlefield, return a creature you control to its owner's hand.
3 / 2
{1}{U}{U}
Streambed Aquitects
Creature - Merfolk Scout
{T}: Target Merfolk creature gets +1/+1 and gains islandwalk until end of turn. (It can't be blocked as long as defending player controls an Island.)

{T}: Target land becomes an Island until end of turn.
2 / 3
{2}{U}{U}
Surgespanner
Creature - Merfolk Wizard
Whenever Surgespanner becomes tapped, you may pay {1}{U}. If you do, return target permanent to its owner's hand.
2 / 2
{1}{U}{U}
Svyelun of Sea and Sky
Legendary Creature - Merfolk God
Svyelun of Sea and Sky has indestructible as long as you control at least two other Merfolk.

Whenever Svyelun attacks, draw a card.

Other Merfolk you control have ward {1}. (Whenever another Merfolk you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays {1}.)
3 / 4
{1}{G}{G}
Swift Warden
Creature - Merfolk Warrior
Flash

When Swift Warden enters the battlefield, target Merfolk you control gains hexproof until end of turn. (It can't be the target of spells or abilities your opponents control.)
3 / 3
{2}{U}{U}
Talrand, Sky Summoner
Legendary Creature - Merfolk Wizard
Whenever you cast an instant or sorcery spell, create a 2/2 blue Drake creature token with flying.
2 / 2
{3}{G}{U}
Tatyova, Benthic Druid
Legendary Creature - Merfolk Druid
Landfall -- Whenever a land enters the battlefield under your control, you gain 1 life and draw a card.
3 / 3
{2}{U}{U}
Tempest Caller
Creature - Merfolk Wizard
When Tempest Caller enters the battlefield, tap all creatures target opponent controls.
2 / 3
--
Temple of the False God
Land
{T}: Add {C}{C}. Activate only if you control five or more lands.
{1}{U}{U}
Thada Adel, Acquisitor
Legendary Creature - Merfolk Rogue
Islandwalk (This creature can't be blocked as long as defending player controls an Island.)

Whenever Thada Adel, Acquisitor deals combat damage to a player, search that player's library for an artifact card and exile it. Then that player shuffles. Until end of turn, you may play that card.
2 / 2
{U}{U}
Thassa's Oracle
Creature - Merfolk Wizard
When Thassa's Oracle enters the battlefield, look at the top X cards of your library, where X is your devotion to blue. Put up to one of them on top of your library and the rest on the bottom of your library in a random order. If X is greater than or equal to the number of cards in your library, you win the game. (Each {U} in the mana costs of permanents you control counts toward your devotion to blue.)
1 / 3
{1}{U}
Thieving Skydiver
Creature - Merfolk Rogue
Kicker {X}. X can't be 0. (You may pay an additional {X} as you cast this spell.)

Flying

When Thieving Skydiver enters the battlefield, if it was kicked, gain control of target artifact with mana value X or less. If that artifact is an Equipment, attach it to Thieving Skydiver.
2 / 1
{2}{U}
Thirst for Meaning
Instant
Draw three cards. Then discard two cards unless you discard an enchantment card.
--
Thornwood Falls
Land
Thornwood Falls enters the battlefield tapped.

When Thornwood Falls enters the battlefield, you gain 1 life.

{T}: Add {G} or {U}.
{4}{U}{U}{U}
Thought Reflection
Enchantment
If you would draw a card, draw two cards instead.
{2}{U}{U}
Thwart
Instant
You may return three Islands you control to their owner's hand rather than pay this spell's mana cost.

Counter target spell.
{3}{U}
Tidal Courier
Creature - Merfolk
When Tidal Courier enters the battlefield, reveal the top four cards of your library. Put all Merfolk cards revealed this way into your hand and the rest on the bottom of your library in any order.

{3}{U}: Tidal Courier gains flying until end of turn.
1 / 2
{U}
Tidal Warrior
Creature - Merfolk Warrior
{T}: Target land becomes an Island until end of turn.
1 / 1
{U}
Tide Shaper
Creature - Merfolk Wizard
Kicker {1} (You may pay an additional {1} as you cast this spell.)

When Tide Shaper enters the battlefield, if it was kicked, target land becomes an Island for as long as Tide Shaper remains on the battlefield.

Tide Shaper gets +1/+1 as long as an opponent controls an Island.
1 / 1
{U}{U}
Tidebinder Mage
Creature - Merfolk Wizard
When Tidebinder Mage enters the battlefield, tap target red or green creature an opponent controls. That creature doesn't untap during its controller's untap step for as long as you control Tidebinder Mage.
2 / 2
{2}{G}
Tishana's Wayfinder
Creature - Merfolk Scout
When Tishana's Wayfinder enters the battlefield, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)
2 / 2
{5}{G}{U}
Tishana, Voice of Thunder
Legendary Creature - Merfolk Shaman
Tishana, Voice of Thunder's power and toughness are each equal to the number of cards in your hand.

You have no maximum hand size.

When Tishana enters the battlefield, draw a card for each creature you control.
* / *
{1}{U}
Towering-Wave Mystic
Creature - Merfolk Wizard
Whenever Towering-Wave Mystic deals damage, target player mills that many cards.
2 / 1
{1}{U}
Treasure Hunt
Sorcery
Reveal cards from the top of your library until you reveal a nonland card, then put all cards revealed this way into your hand.
{U}
Triton Shorestalker
Creature - Merfolk Rogue
Triton Shorestalker can't be blocked.
1 / 1
{1}{U}{U}
True-Name Nemesis
Creature - Merfolk Rogue
As True-Name Nemesis enters the battlefield, choose a player.

True-Name Nemesis has protection from the chosen player.
3 / 1
{4}{U}
Umara Wizard
Creature - Merfolk Wizard
Whenever you cast an instant, sorcery, or Wizard spell, Umara Wizard gains flying until end of turn.
4 / 3
--
Umara Skyfalls
Land

Umara Skyfalls enters the battlefield tapped.

{T}: Add {U}.
4 / 3
--
Unclaimed Territory
Land
As Unclaimed Territory enters the battlefield, choose a creature type.

{T}: Add {C}.

{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.
{1}{U}
Unified Will
Instant
Counter target spell if you control more creatures than that spell's controller.
--
Vineglimmer Snarl
Land
As Vineglimmer Snarl enters the battlefield, you may reveal a Forest or Island card from your hand. If you don't, Vineglimmer Snarl enters the battlefield tapped.

{T}: Add {G} or {U}.
{2}{G}
Vineshaper Mystic
Creature - Merfolk Shaman
When Vineshaper Mystic enters the battlefield, put a +1/+1 counter on each of up to two target Merfolk you control.
1 / 3
{1}{U}
Vodalian Arcanist
Creature - Merfolk Wizard
{T}: Add {C}. Spend this mana only to cast an instant or sorcery spell.
1 / 3
{1}{G}{U}
Vorel of the Hull Clade
Legendary Creature - Human Merfolk
{G}{U}, {T}: Double the number of each kind of counter on target artifact, creature, or land.
1 / 4
{2}{U}
Wake Thrasher
Creature - Merfolk Soldier
Whenever a permanent you control becomes untapped, Wake Thrasher gets +1/+1 until end of turn.
1 / 1
{2}{G}{G}
Waker of the Wilds
Creature - Merfolk Shaman
{X}{G}{G}: Put X +1/+1 counters on target land you control. That land becomes a 0/0 Elemental creature with haste. It's still a land.
3 / 3
{4}{U}{U}
Wanderwine Prophets
Creature - Merfolk Wizard
Champion a Merfolk (When this enters the battlefield, sacrifice it unless you exile another Merfolk you control. When this leaves the battlefield, that card returns to the battlefield.)

Whenever Wanderwine Prophets deals combat damage to a player, you may sacrifice a Merfolk. If you do, take an extra turn after this one.
4 / 4
--
Waterlogged Grove
Land
{T}, Pay 1 life: Add {G} or {U}.

{1}, {T}, Sacrifice Waterlogged Grove: Draw a card.
{2}{U}
Watertrap Weaver
Creature - Merfolk Wizard
When Watertrap Weaver enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
2 / 2
{2}{U}
Wavecrash Triton
Creature - Merfolk Wizard
Heroic -- Whenever you cast a spell that targets Wavecrash Triton, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.
1 / 4
{1}{U}
Whirlpool Rider
Creature - Merfolk
When Whirlpool Rider enters the battlefield, shuffle the cards from your hand into your library, then draw that many cards.
1 / 1
{4}{U}
Wind Strider
Creature - Merfolk Wizard
Flash

Flying
3 / 3
{1}{U}
Wishful Merfolk
Creature - Merfolk
Defender

{1}{U}: Wishful Merfolk loses defender and becomes a Human until end of turn.
3 / 2
{G/U}{G/U}{G/U}
Wistful Selkie
Creature - Merfolk Wizard
When Wistful Selkie enters the battlefield, draw a card.
2 / 2
--
Woodland Stream
Land
Woodland Stream enters the battlefield tapped.

{T}: Add {G} or {U}.
{3}{G}
World Shaper
Creature - Merfolk Shaman
Whenever World Shaper attacks, you may mill three cards.

When World Shaper dies, return all land cards from your graveyard to the battlefield tapped.
3 / 3
--
Yavimaya Coast
Land
{T}: Add {C}.

{T}: Add {G} or {U}. Yavimaya Coast deals 1 damage to you.
{2}{G}{U}
Zegana, Utopian Speaker
Legendary Creature - Merfolk Wizard
When Zegana, Utopian Speaker enters the battlefield, if you control another creature with a +1/+1 counter on it, draw a card.

{4}{G}{U}: Adapt 4. (If this creature has no +1/+1 counters on it, put four +1/+1 counters on it.)

Each creature you control with a +1/+1 counter on it has trample.
4 / 4